Burglar alarm



R. BARRETT BURGLAR ALARM Apr. 10, 1 923.

2 sheets-sheet 1 ed glar. 50, 1922 6 ATTORNEYS.

R. BARRETT Apr. 10, 1923.

BURGLAR ALARM 2 sheets-sheet 2' Filed Mar. 50, 1922 W A TTORNEYS.

Patented Apr. 10, 1923.

UNITED STATES PATENT@FF1E- BOY BARRETT, or PALMYBA, NEW YORK.

BURGLAR ALARM.

Application filed March 30, 1922. Serial No. 548,204.

To all whom it may concern:

Be it known that I, For BARRETT, a citizen of the United States, and resident of Palmyra, in the county of Wayne and State of New York, have invented certain new and useful Improvements in Burglar Alarms, of which the following is a specification.

The present invention relates to burglar alarms and more particularly to the type in which a detonatin device is exploded for the purpose of frightening a burglar, an

object of this invention being to provide a construction in which two series of holders for detonating devices are employed, and a hammer operates first upon a detonating device of one series and then upon a detonating device of another series,-this being continued until all of the detonating devices are exploded.

To these and other ends, the invention consists of certain parts and combinations of parts, all of which will be hereinafter described, the novel features being pointed out in the appended claims.

In the. drawings Fig. 1 is a plan view of a burglar alarm constructed in accordance with this invention;

Fig. 2 is a side view of the construction shown in Fig. 1;

Fig. 3 is a section .on the line 3--3, Fig. 1; Fig. 4 is a section onthe line 44:, Fig. 1; Fig. 5 is a detail view showing the connection between the oscillatory hammer and the spring or motor which moves the latter'in,

the direction of its axis;

Fig. 6 is a section on'the line 6-6, Fig; 1; and

Fig. 7 is a fragmentary plan view of another embodimentof the invention.

Referring more particularly to the embodiment of the invention illustrated in Figs. 1 to 6, inclusive, 1 indicates a base on the opposite end of which two castings 2 are secured by screws 3. These castings may each be provided with spaced ribs or projections 4 on their upper faces, the opposite sides of which converge in order to provide guidingsurfaces for directing a hammer, to be described, between the ribs. In the spacebetween the ribs, pockets are provided for receiving the detonating devices 6, in this instance, in the form of blank shells with caps,

the pockets 5 having lateral openings through which the gases from the caps may pass from the pockets. These two castings 7 with the pockets form two series of holders I ets 13 supported by the base 1. This shaft is parallel with the holders for the detonating devices and each holder of each, series is arranged on the line at right angles to the axis of'the hammer and between the centers of two other holders of the other series, so that the hammer as it oscillates or swings alternately in opposite directions may progressively move in the direction ofits axis on the shaft 12 and cooperate alternately with'detonating devices in the two series of holders, the recoil produced by the explosion of a detonating device of one series effecting the swinging of the hammer toward a detonating device of the other series.

Movement of the recoil operated oscillating hammer in the direction of its axis may be effected in any suitable manner. In this instance, it is effected through a motor in the form of a helical spring 14 secured at 15 to the base 1 and adjustably secured to a lug 16 on an arm 17 which is pivoted at 18 to thebase 1, this arm extending toward the recoil actuated oscillatory hammer and hav ing pivotally connected thereto at 19 a yoke or bifurcated member 20 between the arms of which an arcuate flange 21 on the sleeve 11'of the hammer operates, thus providing a loose connection between the hammer and the motor permitting the oscillation of the hammer without destroying the connection with the motor which moves the hammer in one direction along theshaft 12.

With the end in view of controlling the movement of the hammer in the direction of its axis step by step, a controlling means is provided preferably in the form of a .plu-

.rality of abutmentsor stops 22 arrangedin each of these plates is supported by a pair of swinging members 24, pivoted at to the base and each acted upon by a spring 26 se cured at one end to the member 23 and at its other end at 27 to a swinging member 24. The swinging member also has a stop arm or portion 28 adapted to engage with a stop 29 on the base 1. A loose connection is pro-- latory hammer. This spring 32 is not strong enough however, to move the stops 28 on the swinging member 24 away from the stops or abutments 29. v

lVith the end in view of initiating the movement of the oscillatory or swinging hammer, there be provided a starting motor, which, in this instance, embodies a helical spring 33, surrounding the shaft 12 and anchored at one end 34 to thebase 1, the

other end being extended outwardly and provided with a hook portion 35 adapted to engage with a hook 36 011 an arm 10 when the latter is in its initial position, as illustrated in Figs. 1 and 2, placing the spring 33 under tension so that, when the arm 10 is released, this spring will throw the hammer head 8 to the left hand sideof 1, the

two hooks 35 and 36 disengaging shortly after the hammer begins to swing, due to the fact, that the hook 35 cannot follow the hammer arm 10. As soon as the hooks disengage, the hammer advances slightly along the shaft, dueto the fact that the slide 23 yields by the engagement of the arcuate abutment 21 with the tooth 22 which is nearest to such abutment. Any suitable means may be employed for holding the hammer in its initial position with the spring 33 under tension. In this instance, a detent 37 is provided, pivoted at 38 on a bracket 39, and; controlled in any suitable manner as by a toggle comprising two links 40 and 41 pivoted together at 42, the link 40' being pivoted at 43 at the detent and the link 41 being pivoted at 44 to a fixed part. A cord or other suitable device may be connected at 45 to the link 41 forthe purpose of breaking the toggle which, when in its lowermost position, acts as a lock to prevent the accidental actuation ofthe detent.

The operationof the form of the invention illustrated in Figs. 1 to 6 will be 'understood from the foregoing description,

b-ut it may be summarized as follows: Assuming that the parts are in the positions shown in 1, 2 and 6, the breaking of the toggle through the pulling of the cord or other suitable means shifts the detent 37 to release the hammer arm 10 to the action of the starting spring 33. The head 8 of the hammer swings toward the detonating devices on the opposite sides of the base 1 and in this swinging becomes released from the starting spring 33. Before it reaches the first detonating device the spring 14 acts on the hammer arm and shifts it slightly in the direction of the axis of turning of the hammer until the arcuate flange 21 engages the first abutment- 22 and moves the plate by which said abutment is carried until the projections 3()"are at theopposite ends of the slot 31, placing the spring'32 under ten 'sion and positioning thehammcr 8 so that flanges 4 on oppositesides of a cap that has been exploded it cannot move in the direction of the shaft 12, but as soon as the recoil takes place, due to the explosion of the cap, the head 8 is thrown by said explosion toward the series of detonating devices on the opposite sides of the base 1 and, at the same time, during the turning movement, the hammeradvances on the shaft 12 under the action of the spring 14until the arcuate abutment 21 engages the first stop 22 on the other slide or member 23 on the opposite side of the shaft 12, causing the yielding of such abutment 22 through the movement of the slide or member 23 relatively to the supporting means 24. The hammer head 8 proceeds to the second detonating device on this other side of the base 1 from which it recoils again to the first mentioned side and so on back and forth until all of the detonating devices "have been exploded, the head coming to rest finally on the right hand side of the base, as illustrated in Fig. 1 and the hammer sleeve 11 being moved to its extreme limit under the action of the spring 14. For resetting the hammer the latter is moved preferably to a position perpendicular to the base 1 and is pressed or pushed. toward, the starting spring 33, its ar'cuate abutment 21 cooperating with the bevelled faces of the stops 22 and forcing said stops out of its path, due to the fact that these stops are mounted to move away from the shaft 12 by means of the swinging members 24. When the sleeve 11 of the hammer is in proximity to the starting spring 33, the

thus permitting the hooks 35 and 36 are engaged and the starting spring is placed under tension in which condition it is held by the latch or detent 37.

In the embodimentof the invention illustrated in Fig. 7, the stops or abutments 22 are in the form of pawls pivoted at 46 and individually movable, being arranged in two series on opposite sides of the shaft 12. Each pawl operates between two stops 4'? and 48, these stops, in this instance, on each side of the shaft 12 being arranged on a slide or plate 49 guided by headed screws 50 on the base 1. A spring 5 acts on each pawl 22 to hold such pawl against a stop 48 and a spring 52 acts on each slide 49 to hold the latter against its stop 53. A spring 54, anchored at 55 on the base 1, has one end 56 slidably' connected to the collar 11, otherwise theparts of this construction are the same as the construction illustrated in Figs. 1 to 6. The ope-ration of this construction is effected in the same manner as in Figs. 1 to 6. When in side position the arcuate member 21 lies against the pawl 22 on the left hand side and this pawl lies against the stop 48, but after the hammer armlO has had its hook 36 disengaged from the starting spring 33, the hammer, under the action of the spring 54, moves to shift the first pawl 22 against the stop 47 so that,

when the end of the arcuate portion 21 is reached, the spring 51 will advance the pawl 22 out of the path of the arcuate abutment 21., The operation otherwise isthe same as the embodiment shown in Figs. 1 to 6, the

difference being that pawls 22 move independentlyinstead of together as in the first described embodiment. When the limit of the hammer is reached underthe action of the spring 54, then the return is effected by moving the hammer to a position perpen dicular to the base 1 and pulling it toward the starting spring 33. 'In moving toward the spring 33, the arcuate abutment 21 will engage with the pawls or abutments 22 and through the stops 48 will move the slides 49 against the action of theirsprings 52, thus permitting the pawls or abutments 22 to move away from the. axis of the hammer and; out of the path of the arcuate abutment 21.

' From the foregoing it will be seen that there hasbeen provided a burglar alarm in which a recoil operated oscillatory hammer is provided, there being associated with the hammer two series of holders for detonating devices, arranged parallel withthe axis of rotation of the hammer, the center of each holder being arranged on aline at a right angle to the axis of oscillation of the hammer and between the center of two holders of the other series. 2 A motor initiates the movement of the hammer and disconnects with the latter,while the hammer i is being moved to the first detonating device.

A novel means connects with the hammer for moving the latter in the direction of the latter, while permitting such rotation.

Means controls the movement of the hamw mer step by step in the directlon of its ing adapted to be alternately engaged by an arcuate abutment carried'by the hammer. Means is provided which permits the movement of said abutments outof the path of -the arcuate abutment, as the hammer is moved to its initial position. parent that this device when once started will continue to operate until all of the detonating devices have been'exploded. This, it will be apparent, will have a deterring effect upon a burglar, who will imagine that he is being fired at by someone. Under any condition it will produce an alarm which will frighten the burglar away.

What I claim as my invention and desire to secure by Letters Patent is 1. A burglar alarm comprising a recoil actuated oscillating hammer, means for supporting said hammer to permit it to oscil-' It -is apaxis of oscillation of the hammer and be- 7 tween the centers of two other holders of the other series.

2. A burglar alarm comprising a recoil actuated oscillatinghammer, means for supporting said hammer to permit it to oscillate and to move in the direction of its axis of oscillation, means formoving the hammer in the direction of its'axis of oscillation, two series'of holders for detonating devices arranged parallelwith and on opposite sides of said axis of oscillation, the center of each holder of each seriesbeing arranged one line at right angles to'the axis of oscillation of the hammer and between thecenters of two other holders of the other series, and means for producing a'step by step movement of the hammer in the direction of its on a line at right angles to the axis of oscil lation of the hammer and between the centers of two other holders of the other series, and a motor for initiating movement of the hammer, having a connection with the hammer which disconnects from the latter while said hammer is being moved to, the first holder.

4. An alarm comprising a recoil actuated. oscillating hammer movable in the direction of its axis of oscillation, means for supporting said hammer to permit it to oscillate and to move in the direction of its axis of oscillation, a spring for moving said hammer in the direction of its axis of oscillation, means for holding detonating devices on opposite sides of the axis of oscillation, and means for controlling the movement of the recoil actuated. oscillatory hammer in the direction of its axis of oscillation to cause the hammer to operate successively on detonating devices on opposite sides of the axis of oscillation.

5. An alarm comprising a recoil actuated oscillating hammer movable in the direction of its axis of oscillation, means for support,- ing said hammer to permit it to oscillate and to move in the direction of its axis of oscillation, means for holding detonating devices on opposite sides of'its axis of oscillation, and a spring for moving the recoilactuated oscillatory hammer in the direction of its axis of oscillation having a slip connection with said hammer to permit the oscillation of the hammer.

6. An alarm comprising arecoil actuated 7 oscillating hammer movable in the direction of its axis of oscillation, means for supporting said hammer to permit it to oscillate and to move in the direction of its axis of oscillation, means for holding detonating de vices on opposite sides of its axis of oscillation, and a spring for moving the recoil actuated oscillatory hammer in the direction of its axis of oscillation having a slip connection with said hammer to permit the oscillation of the hammer, said slip connection embodying a flange on the hammer and a pivoted lever to which the spring is connected carrying a portion in which said flange cooperates. I

7. A burglar alarm comprising a recoil actuated oscillatory hammer movable in the direction of its axis of oscillation, means for supporting said hammer to permit it to oscillate and to move in the direction of. its axis of oscillation, two series of holders for detonating devices arranged on opposite sides of said axis of oscillation, the center of each holder being arranged on a line at right angles of oscillation of the hammer between the centers of the two holders of the other series, and guiding projections for the hammer arranged between the holders.

8. A burglar alarm comprising a shaft,

a recoil actuated oscillatory hammer turning on the shaft and movable longitudinally thereof, two series of holders for detonating devices arranged on opposite sides of the shaft parallel with the latter, means for moving the hammer in the direction of its axis of oscillation, and a motor for initiating the movement of the hammer, having a connection with the hammer to disconnect with the latter while said hammer is being moved. to tho first detonating device.

9. A burglar alarm comprising a shaft, a recoil actuated oscillatory hammer turning on the shaft and movable longitudinally thereof, two series of holders for detonating devices arranged on opposite sides of the shaft parallel with the latter, means for moving the hammer in the direction of its axis of oscillation, and a motor for initiating the movement of the hammer, disconnecting with the latter while said hammer is being moved to the first detonating device, said motor being in the form of a coil spring arranged about the shaft having one arm rigidly secured and the other arm detachably connected with the hammer.

10. A burglar alarm comprising a shaft, a recoil actuated oscillatory hammer turning on the shaft and movable longitudinally thereof, two series of holders for detonating devices arranged on opposite sides of the shaft parallel with the latter, means for moving the hammer in the direction of its axis of oscillation, a motor for initiating the movement of the hammer, disconnecting with the latter while said hammer is being moved to the first detonating device, said motor being in the form of a coil spring arranged about the shaft, having one arm rigidly; secured and the other arm detachably connected with the hammer, and detaining means for holding the arm against movement under the action of the initiating motor.

11. A burglar alarm comprising a recoil actuated. oscillatory hammer movable in the direction of its axis of oscillation, means for supporting said hammer to permit it to oscillate and to move in the direction of its axis of oscillation, means for controlling the movement of the hammer in the direction of its axis of oscillation step by step, said means embodying two series of abutments arranged in staggered relation on opposite sides of the axis of oscillation of the hammer and adapted to be alternately engaged by the hammer as it moves in the direction of its axis of oscillation, and means permittin the movement of said abutments out of the path of the hammer so that the latter may be moved to its initial position.

12. A burglar alarm comprising a recoil actuated oscillatory hammer movable in the direction of its axis of oscillation. means for supporting said hammer for oscillatory ,mer' in the direction of its axis of oscillation step by step, said means embodying two series of abutments arranged in staggered relation on opposite sides of the axis of oscillation of the hammer and adapted to be alternately engaged by the hammer as it moves in the direction of its axisot oscillation, means permitting the movement of said abutments out of the path of the hammer so that the latter may be moved to its initial position, and means yieldingly holding said abutments in the path of the hammer to permit such movement out of the path when the hammer is shifted to its initial position. a

13. A burglar alarm comprising a recoil actuated oscillatory; hammer movable in the direction of its axis of oscillation, means for supporting said hammer for oscillatory movement and also movement in the direction of its axis of oscillation, means for controlling the movement of the hammer in the direction of its axis of oscillation step by step, said means embodying an arcuate abutment carried by the hammer, and two series of abutments arranged in staggered relation on opposite sides of the axis of oscillation of the hammer and adapted to be alternately engaged by the arcuate abutment on the hammer.

14. Aiburglar alarm comprising a recoil actuated oscillatory hammer movable in the direction of its axis of oscillation, means for supporting said hammer for oscillatory movement and also movement in the direction of its axis of oscillation, means for controlling the movement of the hammer in the direction of its axis of oscillation step by step, said means embodying two series of abutments arranged in staggered relation on opposite sides of the axis of oscillation of the hammer, and an arcuate abutment carried by the hammer and'adapted for alternate engagement with said two series of abutments, the hammer turning said arcuate abutment while engaging one of the series of abutments until the arcuate abutment passes 0-H said abutment of the series, another portion of the arcuate abutment then cooperating with an abutment of the other series.

15. A burglar alarm comprising a recoil actuated oscillatory hammer movable in the direction of its axis ofoscillation, means for supporting said hammer for oscillatory movement and also movement in the direction of its axis of oscillation, means for controlling the movement of the hammer in the direction of its axis of oscillation step by step, said means embodying two series of abutments arranged in staggered relation on opposite sides of the axis of oscillation of the hammer, said abutmentshaving a limited yielding movement in the direction of the axis of movement of the hammer, and an abutment carried by; the hammer to cooperate alternately with the abutments of the two series in order to cause the engaged abutment of the series ,to yield, said hammer abutment being moved by the hammerto release the engaged abutment of the series of abutments so that the latter may assume its normal position out of the path of the hammer abutment.

16; A burglar alarm comprising a recoil actuated oscillatory hammer movable inthc direction of its axis of oscillation, means for supporting said hammer for oscillatory movement and also movement in the direction of its axis of oscillation, means for controlling the movement of the hammer in the direct-ion of its axis of oscillation step by step, said means embodying two series of abut-ments arranged in staggered relation on opposite sides of the axis c t oscillation of the hammer, said abutments having a limited yielding movement in the direction of the axis of movement of the hammer, an abutment carried by the ham mer to cooperate alternately with the abutments of the two series in order to cause the engaged abutment of the series to yield, said hammer abutment being moved by the hammer to release the engaged abutment of the series of abutments so that the latter may assume its normal position out of the path of the hammer abutment, and means permitting the yielding of the two series of abutments when the hammer abutment cooperates with said series of abutments on the movement of the hammer toward its initial osition.

17. burglar alarm comprising a recoil actuated oscillatory hammer movable in the direction of its axis of oscillation, means for supporting said hammer for oscillatory movement and also movement in the direction of its axis of oscillation, means for moving the hammer in the direction of its axis of oscillation and two members arranged on opposite sides of the axis of oscillation and each provided with a series of abutments, the members of the two series being arranged in staggered relation so as to be alternately engaged by the hammer, means permitting the yielding of said members in the direction of the movement of the hammer away from its initial position when the hammer engages'anyone of the abutments on either one of said members so that such engaged abutment on the member may move out of the path of the hammer when released by the'latter, and means for permitting the yielding of said members laterally with reference to the axis of oscillation so that the abutments carried by the members may be shifted out of the path of movement andalso movement in the directhe hammer .whenthe latter is movedtoward its initial position.

18. A burglar alarm comprising a recoil actuated oscillatory hammer movable in the direction of its axis of oscillation, means direction of the axis of oscillation when anyone of the abutments thereon is engaged by the hammer in moving away from its initial position, said members also being movable away from the axis of oscillation to permit the hammer to be moved to its initial position.

19. A burglar alarm comprising a recoil actuated oscillatory hammer movable in the direction of its axis of oscillation, means for supporting said hammer tor oscillatory tion of its axis of oscillation, two members provided with two series of abutments on opposite sides of the axis of oscillation, said abutments being adapted for alternate engagement by the hammer, swinging members on which said abutment carrying members having a yielding movement in the direction of the axis of oscillation ofthehammer so that each abutment as engaged by the hammer may yield to return to its initial position after disengagement by the hammer, and said swinging members permitting the abutment carrying members to move away from the axis of oscillation when the abiitments on said abutment carrying members are engaged by the hammer as the latteris moved toward its initial position.

20. A burglar alarm comprising a recoil actuated oscillatory. hammer movable in the direction'of its axis of oscillation, means for supporting said hanimerfor oscillatory movement and also movement in the direction of its axis of oscillation, two members arranged on opposite sides of the axis of oscillation and each carrying a series of abutmentspthe abutments on the two mem bers being arranged in staggered relation so as to be alternately engaged by the hammer, swinging members on which said abutment carrying members are mounted, pin and slot connection between each abutment carrying member and its swinging members, stops limiting the movement of the swing ing members, means acting on the swinging members to hold them in cooperation with the stops while'permitting the abutmentcarrying members to move away from the axis of oscillation of the hammer when the hammer is moved to its initial position, and springs acting on the abutment carrying members for holding the latter in position on the swinging members which will permit the abutments to yield'in the direction of its axis of oscillation of the hammer after the hammer engages such abutments in moving away from its initial position.

nor BARRETT. 

